The picture of the reflection nebula NGC 6914 (blue) was the first attempt with my newly attached flattener without any further optimization.
NGC 6914
The primary target of my astrophoto evening (NGC 6914) is, for a 600mm telescope with an APS-C chip, a bit small. But i like the contrast of the blue reflection nebula and the red emission nebulae.
Lessons Learned
Lightreflection
In the upper left part of the picture is a lightreflection i never had before. Possibly the caused of a nearby lamp. I ll have to see, if this is a one time-effect or if this is caused by the combination of the lamp and my new flattener.
Flattener
This picture is the 1st one i shoot with a flattener in my refractor, the TSFlat2. The stars are round! Even in the corners.
Exposure time
The total exposure time of only about 120 minutes is really a bit too short. It would be good for the image if i could double the exposure time. But taking the weather sitution into count, i can be very pleased with the result.
High resolution on Flickr:
Session details
| Telescope | VIXEN ED80sf |
|---|---|
| Corrector | TSFlat2 |
| Effective focal length | 600 mm |
| Camera | Canon EOS M100(a) |
| Mount | Skywatcher HEQ5 Pro |
| Guiding equipment | TS-Optics 50 |
| Guiding camera | Omegon 1200b |
| Date of capture | 18 July 2021 |
| Exposure (lights) | 37 × 180 s |
| Total integration | 1 h 51 min |
| Calibration frames | FLATS, DARKS, BIAS |
| Sensitivity | ISO 800 |
| Processing | 19 July 2021 — Affinity Photo |
| Reprocessing | 6 January 2024 — PixInsight, Affinity Photo |
| Location | Koblenz |
| Focal ratio | f/7,5 |
| Image scale | 1,28 ″/px |
| Field of view | 128,0 × 85,3 ′ |
